NDLI: Three dimensional flow simulation of load rejection of a prototype pump-turbine

Content Provider	Springer Nature Link
Author	Jintao, Liu Shuhong, Liu Yuekun, Sun Yulin, Wu Leqin, Wang
Copyright Year	2012
Abstract	Three dimensional (3D) unsteady, incompressible flows in a pump-turbine during a transient process of load rejection were studied using the computational fluid dynamics method. The dynamic mesh (DM) method and remeshing method combined with non-conformal grid boundaries were applied to simulate the rotation of guide vanes. The fluid coupling and DM method were used to calculate the rotational speed for each time-step. Calculations were performed based on the $$ \overline{{v^{2} }} - f $$ turbulence model to incorporate the near-wall turbulence anisotropy as well as non-local pressure–strain effects. Results show that $$ \overline{{v^{2} }} - f $$ model is thought to be suitable to predict characteristics of the transient process during load rejection in a pump-turbine. The transient explicit characteristics, such as the flow-rate, head, torque of the runner, etc., during the process of load rejection are analyzed. Pressure fluctuation was larger in the region close to the runner during the load rejection. Stalls and reverse flow in the runner resulted in the decrease of the torque of runner at turbine mode and turbine-braking mode. Simulation results were also compared and verified by experimental results. 3D simulations can be used instead of experiments to study the influence of inner flow to the external characteristics during transient processes. This calculation was based on a prototype of a pumped storage power station, and the computational method could be used in the fault diagnosis of transient operation.
Starting Page	417
Ending Page	426
Page Count	10
File Format	PDF
ISSN	01770667
Journal	Engineering with Computers
Volume Number	29
Issue Number	4
e-ISSN	14355663
Language	English
Publisher	Springer London
Publisher Date	2012-04-28
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pump-turbine Load rejection Numerical simulation Dynamic mesh Computer-Aided Engineering (CAD, CAE) and Design Math. Applications in Chemistry Systems Theory, Control Calculus of Variations and Optimal Control; Optimization Mechanics ApplicationMathematics/Computational Methods of Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Computer Science Applications Modeling and Simulation Software

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